Home / 21,940.79-30,270.44-13,439.84

Finding the Fourth Proportional to 21,940.79, 30,270.44 and 13,439.84

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Solution

The fourth proportional to 21,940.79, 30,270.44 and 13,439.84 is: 18,542.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,940.79 : 30,270.44 = 13,439.84 : x
  2. Step 2: Convert to fraction form
    21,940.79/30,270.44 = 13,439.84/x
  3. Step 3: Cross multiply
    21,940.79x = 30,270.44 × 13,439.84
  4. Step 4: Simplify right side
    21,940.79x = 406,829,752.58
  5. Step 5: Solve for x
    x = 406,829,752.58/21,940.79
  6. Step 6: Final answer
    x = 18,542.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.